Occam's razor: When faced with competing hypotheses, select the one that makes the fewest assumptions. Do not multiply entities without necessity.

Grice's razor: As a principle of parsimony, conversational implications are to be preferred over semantic context for linguistic explanations.[2]

Hanlon's razor: Never attribute to malice that which can be adequately explained by stupidity.[3]

Hume's razor: "If the cause, assigned for any effect, be not sufficient to produce it, we must either reject that cause, or add to it such qualities as will give it a just proportion to the effect."[4][5]

Hitchens's razor: "What can be asserted without evidence can be dismissed without evidence."